CN104662976A - Methods for performing link adaptation and related base stations - Google Patents
Methods for performing link adaptation and related base stations Download PDFInfo
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- CN104662976A CN104662976A CN201280076060.0A CN201280076060A CN104662976A CN 104662976 A CN104662976 A CN 104662976A CN 201280076060 A CN201280076060 A CN 201280076060A CN 104662976 A CN104662976 A CN 104662976A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
- H04L1/0021—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach in which the algorithm uses adaptive thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/203—Details of error rate determination, e.g. BER, FER or WER
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Abstract
The present disclosure relates to a link adaptation scheme. In one embodiment, there provides a method for performing link adaptation in an uplink subframe for a first cell, the method comprising: obtaining interference to the uplink subframe of the first cell from at least one neighboring cell's downlink subframe occupying a time interval same as the uplink subframe; determining whether the obtained interference exceeds a predetermined threshold; and applying to the uplink subframe a first link adaptation loop when the obtained interference exceeds the predetermined threshold.
Description
Technical field
The disclosure relates to link adaptation, more specifically, relates to the method for performing link adaptation in cellular wireless system and associated base stations.
Background technology
Except as otherwise noted, the method that this section describes is not the prior art of the application's claim, and is not recognized as prior art because being included in this section.
3GPP is just in research trends UL DL sub-frame configuration, and Chinese industrial and information technology directorate (MIIT) show great interest to this.In the latter, dynamic uplink downlink subframe configurations (being after this called for short dynamic TDD) is considered to improve one of key technology of the performance under focus and indoor scene.
Adopt dynamic TDD, neighbor cell can be configured different uplink sub-frame configuration.Fig. 1 illustrates uplink channel interference source difference when two neighbor cells have been configured different UL DL sub-frame configuration.Community A and B has been configured TDD sub-frame configuration 1 and 2 respectively.In cell a, subframe 2 and 7 experiences the interference from the ul transmissions of UE in the B of community, and subframe 3 and 8 experiences the interference from the downlink transmission in the B of community.
In the downlink, be designated as according to configured CFI, PDCCH and send in front 1 to 3 symbol.In the uplink, PUCCH is designated as and sends on side PRB.
Fig. 2 and 3 respectively illustrates the frame structure of CRS and up link DM-RS.
Subframe 3 and 8 is configured to downlink subframe for community B but for the uplink sub-frames of community A.For community B, in these subframes, the transmission signal in control area and do not disturb up link DM-RS from the CRS of community B, but some data symbols in the up link of interfered cell A.Therefore, be difficult to guarantee that quality of wireless channel is measured and estimated accuracy.
Subframe 2 and 7 is configured to the uplink sub-frames in community A and community B.In the uplink, due to the interference (because UE sends signal on all symbols of distributed PRB) that up link DM-RS symbol experience is similar to data symbol, channel quality measurement and estimated accuracy can be guaranteed.
Link adaptation should according to radio condition, can use running time-frequency resource, buffer status, predefine parameter etc. come adaptive transmission data rate, make it possible to optimization system performance and/or Consumer's Experience.
The simple examples of uplink adaptation is below described.Not affecting in description situation of the present invention, suppose that UE has full buffer traffic.On the PRB dispatched for UE, in every frame, measure SINR to carry out MCS selection in subframe on the horizon.In order to keep predetermined BLER target, using and overcoming measure error, channel variation and interference based on the next adaptive delta value of PUSCH CRC check state.Now, the effective SINR on the PRB distributed in current uplink subframe can be expressed as formula 1:
effectiveSINR＝measSINR+Δ
adapted
-Shi 1
Herein,
measSINRthe SINR in present sub-frame, up link PRB used measured; Δ
adaptedit is described delta value; EffectiveSINR is effective SINR of expection.
Maximum available SINR when distributing given number PRB can be estimated as formula 2:
(in units of dB)
-Shi 2
Herein, PH is the up-link power headroom of definition in 36.211; N
pRB, measit is the number of PRB used in current uplink subframe; N
pRB, xit is one of possible number of the PRB that can distribute in uplink sub-frames on the horizon.
As an example, jump algorithm as shown in Equation 3 can be used to carry out adaptive Δ
adapted.When there is PUSCH and decoding unsuccessfully, the full step-length of application is lowered, and when there is PUSCH successfully decoded, applies the rise be directly proportional to BLER target.
-Shi 3
In fact, may exist and consider the certain optimisation of various factors, such as, PRB distributes compromise, presence of intercell interference between user's effect and Consumer's Experience.As an example of system function optimization aspect, when exist in community multiple there is the user of uplink service time, community can attempt dispatching multiple user in a uplink sub-frames, and only can distribute a part of available uplink PRB to each in dispatched user.Now, with only dispatch the situation of unique user statically in subframe compared with, user can have higher effective SINR, and the higher MCS that is scheduled.
When disposing dynamic TDD, when neighbor cell has been configured different UL DL sub-frame configuration, the interference characteristic between different uplink sub-frames, wireless quality have been measured and estimated accuracy may be very different.For specific sub-frame, when all neighbor cells are configured as uplink sub-frames, the interference in each community in subframe can well be estimated, because comprise in channel estimation from the interference effect of neighbor cell.When this sub-frame configuration is downlink subframe by some (being called the cell set DL of this subframe) in neighbor cell, but other communities (being called the cell set UL of this subframe) will this sub-frame configuration when being uplink sub-frames, because uplink channel estimation fully cannot catch this fact of interference effect from CRS and PDCCH of cell set DL, cell set UL may underestimate interference, thus over-evaluates SINR.When any one in cell set DL only sends CRS and PDCCH in subframe, especially true.
For specific sub-frame, in cell set UL, when applying single common uplink adaptation ring for all uplink sub-frames, the uplink sub-frames that the downlink transmission by cell set DL is disturbed can trigger the delta value that generation is very guarded.This may make the uplink sub-frames serious deterioration of the interference without the downlink transmission always from arbitrary neighborhood community.
Figure 4 and 5 respectively illustrate when there is the measurement from community B to two indoor picocells when the CRS of community A interference and CRS+PDCCH interference.The concise and to the point configuration that Fig. 4 and Fig. 5 measures can respectively as shown in following table 1 and table 2.
The concise and to the point configuration that table 1: Fig. 4 measures
The concise and to the point configuration that table 2: Fig. 5 measures
Can see: when exist from community B CRS interference and there is single link adaptation ring in the uplink time, because in subframe in the A of community 3 and 8, SINR over-evaluates, cause uplink sub-frames 2,7 deterioration.
When there is stronger UE and disturbing UE, similar problem is existed for the link adaptation in down link.
Summary of the invention
According to the disclosure, propose the scheme improving up link and down link link adaptation respectively.
In first aspect of the present disclosure, provide a kind of method for performing link adaptation in the uplink sub-frames for the first community.Described method can comprise: acquisition and described uplink sub-frames take the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community; Determine whether obtained interference exceedes predetermined threshold; And work as obtained interference when exceeding predetermined threshold, the first link adaptation ring is applied to described uplink sub-frames.
In one example, described method can also comprise: when obtained interference is lower than predetermined threshold, applies the second link adaptation ring to described uplink sub-frames.
In another example, described first link adaptation ring can correspond in described neighbor cell the interference obtained from neighbor cell.
In another example, wherein, described first link adaptation ring can be characterized by a SINR compensating factor.
In this case, applying the first link adaptation ring to described uplink sub-frames can comprise: based on the SINR of a SINR compensating factor and actual measurement in described uplink sub-frames, select Modulation and Coding Scheme (MCS).
Alternatively, the CRC check result that a described SINR compensating factor can be corresponding based on transmission when exceeding predetermined threshold with obtained interference.
Alternatively, described second link adaptation ring can be characterized by the 2nd SINR compensating factor.
In this case, applying the second link adaptation ring to described uplink sub-frames can comprise: based on the SINR of the 2nd SINR compensating factor and actual measurement in described uplink sub-frames, select MCS.
Alternatively, described 2nd SINR compensating factor can based on obtained interference lower than the corresponding CRC check result of transmission during predetermined threshold.
In another example, described interference can be indicated by the intensity of cell specific reference signal (CRS).Such as, the intensity of described CRS can be the RSRP of CRS.
Alternatively, described interference can be indicated by the intensity of the intensity of the intensity of master sync signal (PSS), auxiliary synchronous signals (SSS) or CSI-RS.
In second aspect of the present disclosure, provide a kind of for performing the method for link adaptation in the downlink subframe for first user equipment (UE).Described method can comprise: acquisition and described downlink subframe take the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE; Determine whether obtained interference exceedes predetermined threshold; And if the interference obtained exceedes predetermined threshold, the first link adaptation ring is applied to described downlink subframe.
In one example, described method can also comprise: if the interference obtained is lower than predetermined threshold, applies the second link adaptation ring to described downlink subframe.
In another example, described first link adaptation ring can correspond in described neighbor cell UE the interference obtained from neighbor cell UE.
In another example, described first link adaptation ring can be characterized by a SINR compensating factor.
In this case, applying the first link adaptation ring to described downlink subframe can comprise: based on the SINR of a SINR compensating factor and actual measurement in described downlink subframe, select Modulation and Coding Scheme (MCS).
Alternatively, the HARQ ACK/NACK that a described SINR compensating factor can be corresponding based on transmission when exceeding predetermined threshold with obtained interference feeds back.
Alternatively, described second link adaptation ring can be characterized by the 2nd SINR compensating factor.
In this case, applying the second link adaptation ring to described downlink subframe can comprise: based on the SINR of the 2nd SINR compensating factor and actual measurement in described downlink subframe, select MCS.
Alternatively, described 2nd SINR compensating factor can feed back based on HARQ ACK/NACK.
Alternatively, described interference can be indicated by the intensity of PUSCH or PUCCH.
In the third aspect of the present disclosure, provide a kind of link adaptation method, comprising: the first link adaptation ring is applied to the first sub-frame set; And the second link adaptation ring is applied to the second sub-frame set.
In fourth embodiment of the present disclosure, provide a kind of base station performing link adaptation in the uplink sub-frames for the first community.Described base station can comprise: acquiring unit, be configured to obtain and described uplink sub-frames take the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community; Determining unit, is configured to determine whether obtained interference exceedes predetermined threshold; And link adaptation unit, be configured to work as obtained interference when exceeding predetermined threshold, the first link adaptation ring is applied to described uplink sub-frames.
In fifth embodiment of the present disclosure, provide a kind of for performing the base station of link adaptation in the downlink subframe for first user equipment (UE).Described base station can comprise: acquiring unit, be configured to obtain and described downlink subframe take the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE; Determining unit, is configured to determine whether obtained interference exceedes predetermined threshold; And link adaptation unit, be configured to, when obtained interference exceedes predetermined threshold, apply the first link adaptation ring to described downlink subframe.
In sixth embodiment of the present disclosure, provide a kind of link adaptation device, comprising: link adaptation unit, be configured to apply the first link adaptation ring to the first sub-frame set, and the second link adaptation ring is applied to the second sub-frame set.
Embodiment of the present disclosure at least causes following benefit and advantage:
-can protect and guarantee the performance of the uplink sub-frames do not disturbed by the downlink transmission of neighbor cell, and the expected performance of the uplink sub-frames disturbed by the downlink transmission of neighbor cell can be realized;
-can protect and guarantee the performance of the downlink subframe do not disturbed by the ul transmissions of neighbor cell UE, and the expected performance of the downlink subframe disturbed by the ul transmissions of neighbor cell UE can be realized; And
-low implementation complexity.
Accompanying drawing explanation
By below in conjunction with the detailed description of accompanying drawing to disclosure embodiment, above and other object of the present disclosure, Characteristics and advantages will be more obvious, in the accompanying drawings:
Fig. 1 illustrates the example with two neighbor cells that different TDD configures;
Fig. 2 shows the example of the downlink cell specific reference signals of two antenna ports;
Fig. 3 shows the example of uplink demodulation reference signal (DM-RS);
Fig. 4 a shows the uplink performance (every subframe SINR) when only there is CRS and disturbing PUSCH;
Fig. 4 b shows the uplink performance (every subframe BLER) when only there is CRS and disturbing PUSCH;
Fig. 4 c shows the uplink performance (every subframe uplink link throughput) when only there is CRS and disturbing PUSCH;
Fig. 5 a shows the uplink performance (every subframe SINR) when there is CRS and disturbing PUSCH PUSCH interference and PDCCH;
Fig. 5 b shows the uplink performance (every subframe BLER) when there is CRS and disturbing PUSCH PUSCH interference and PDCCH;
Fig. 5 c shows the uplink performance (every subframe uplink link throughput) when there is CRS and disturbing PUSCH PUSCH interference and PDCCH;
Fig. 6 shows the exemplary radio communications scene can applying the application;
Fig. 7 shows the flow chart of the method for performing link adaptation in uplink sub-frames according to the disclosure first embodiment;
Fig. 8 shows another exemplary radio communications scene can applying the application;
Fig. 9 shows the flow chart performing the method for link adaptation in downlink subframe according to the disclosure second embodiment;
Figure 10 a shows the simulation result of the single link adaptation ring according to prior art;
Figure 10 b shows the simulation result of the dual link adaptation ring according to the application;
Figure 11 shows the block diagram of the base station 1100 for performing link adaptation in the uplink sub-frames for the first community according to the disclosure the 3rd embodiment; And
Figure 12 shows the block diagram of the base station 1200 for performing link adaptation in the downlink subframe for a UE according to the disclosure the 4th embodiment.
Embodiment
In the following detailed description, with reference to the accompanying drawing forming its part.In the accompanying drawings, unless context is made separate stipulations, similar mark identifies similar assembly usually.The illustrated examples described in detailed description, accompanying drawing and claim or embodiment are not intended to limit.Other examples or embodiment can be adopted, and other changes can be made when not deviating from the spirit or scope of the theme provided herein.By easy to understand: describe, in general terms each side of the present disclosure illustrated in the accompanying drawings can arrange, replace, combine and design with multiple difference configuration herein, described multiple difference configuration be all be easy to expect and form a part of this disclosure.
In the disclosure, the one mechanism or tactful applied in the link adaptation that link adaptation ring can refer in up link or down link.
Fig. 6 shows the exemplary radio communications scene can applying the application.As shown in Figure 6, there is the UE (that is, UE 640) that three base stations (being expressed as BS 610, BS 620 and BS 630) and BS 610 serve.Will be appreciated that there is less or more BS, and more than one UE can be there is.
For a subframe, suppose that it is configured to the uplink sub-frames for BS 610, that is, between BS 610 and UE 640, there is ul transmissions, but this subframe is configured to the downlink subframe for BS 620 and BS 630.In this case, as shown in Figure 6, in this subframe, the downlink transmission of BS 620 and BS 630 may disturb the ul transmissions between BS 610 and UE 640.
Consider Fig. 6, Fig. 7 shows the method 700 for performing link adaptation in uplink sub-frames according to the disclosure first embodiment.
As shown in Figure 7, BS 610 can obtain and described uplink sub-frames takies the interference (S710) of downlink subframe to the uplink sub-frames of described first community of at least one neighbor cell at same time interval.
Exemplarily, described interference can be indicated by the intensity of cell specific reference signal (CRS).Preferably, the intensity of described CRS can refer to the RSRP of CRS.
As another example, described interference can by the intensity of master sync signal (PSS) or the instruction such as the intensity of auxiliary synchronous signals (SSS) or the intensity of CSI-RS.
In addition, described interference can be determined according to the notice (notice on such as X2) between neighbor cell.
Then, BS 610 can determine whether obtained interference exceedes predetermined threshold (S720).
When obtained interference exceedes predetermined threshold, BS 610 can apply the first link adaptation ring (the "Yes" branch of S730, S720) to uplink sub-frames.
As non-restrictive example, the first link adaptation ring can by a SINR compensating factor (Δ as previously mentioned herein
adapted) characterize.In this case, can comprise the operation that uplink sub-frames applies the first link adaptation ring: based on a SINR compensating factor and in uplink sub-frames the SINR of actual measurement select Modulation and Coding Scheme (MCS).
Alternatively, the CRC check result that a SINR compensating factor can be corresponding based on transmission when exceeding predetermined threshold with obtained interference.
Alternatively, method 700 can also comprise the following steps: when obtained interference is lower than (the "No" branch of S740, S720) during predetermined threshold, apply the second link adaptation ring to described uplink sub-frames.
As non-restrictive example, the second link adaptation ring can by the 2nd SINR compensating factor (Δ as previously mentioned
adapted) characterize.In this case, can comprise the step that uplink sub-frames applies the second link adaptation ring: the SINR based on the 2nd SINR compensating factor and actual measurement in uplink sub-frames selects to modulate MCS.In addition, the 2nd SINR compensating factor can based on obtained interference lower than the corresponding CRC check result of transmission during predetermined threshold.
Such as, when being taken as Δ
adaptedtime, adaptive first/two SINR compensating factor can be carried out according to formula 3 based on the CRC check result corresponding with the ul transmissions on corresponding uplink sub-frames.Parameter for the link adaptation of each uplink sub-frames needs not to be identical, comprises such as BLER target, HARQ sends the target numbers of attempting and initial delta value etc.
Employing method 700, the uplink sub-frames of each UE can be divided into different uplink sub-frames groups.There is a uplink link adaptation ring in each uplink sub-frames group of UE.Below, about how, uplink sub-frames be divided into different uplink sub-frames groups and apply for each group the detailed protocol that independent uplink link adaptation ring provides example.
As the CRS (or and other downlink physical channel) arbitrary neighbor cell being detected and in uplink sub-frames, the intensity (such as RSRP) of CRS exceedes predetermined threshold time, this uplink sub-frames can extract from default uplink sub-frames group:
If do not have existing uplink sub-frames group to experience the interference of the above-mentioned downlink transmission from neighbor cell, new uplink sub-frames group can be set up, and form for this uplink sub-frames and build new link adaptation ring.
Otherwise when there is the above-mentioned interference from neighbor cell of existing uplink sub-frames group experience as extracted uplink sub-frames, the uplink sub-frames extracted may be added to existing uplink sub-frames group.Herein, the link adaptation ring for this existing uplink sub-frames group is also applicable to new subframe of adding.
Similarly, if each uplink sub-frames belongs to existing uplink sub-frames group, whether community can change in monitor interference source.Particularly, if disappeared (such as disturbing the tested RSRP of adjacent cell lower than predetermined threshold) from the interference of the downlink transmission of neighbor cell, uplink sub-frames should extract and be included to default uplink sub-frames group from current uplink subframe group.
In addition, each link adaptation ring can correspond to institute survey disturb from a neighbor cell (namely disturbing neighbor cell).Such as, if disturb the downlink transmission changed into from another community, uplink sub-frames can be included to another uplink sub-frames group with same disturbance source (if such uplink sub-frames group exists), and can directly apply to new subframe of adding for the link adaptation ring of this uplink sub-frames group.Otherwise, new uplink sub-frames group can be set up, and uplink sub-frames will be included to new uplink sub-frames group.
As an example, when there is two neighbor cells as shown in Figure 1, subframe 3,8 is included as a uplink sub-frames group, and subframe 2 and 7 is included as another uplink sub-frames group.For each uplink sub-frames group, based on the PUSCH CRC check result corresponding with the uplink sub-frames belonging to uplink sub-frames group, create and safeguard an independent link adaptation ring.
Like this, up-line system performance can be improved, suffer the impairment of the uplink sub-frames disturbed by the downlink transmission of neighbor cell to protect the uplink sub-frames do not disturbed by the downlink transmission of neighbor cell to avoid; And realize the expected performance of the uplink sub-frames disturbed by the downlink transmission of neighbor cell.
Fig. 8 shows another exemplary radio communications scene can applying the application.As shown in Figure 8, there is three UE (being expressed as UE 810, UE 820 and UE 830) and a base station (that is, BS 840), wherein, UE 810 is served by BS 810, and UE 820 and UE 830 is all UE of neighbor cell.Will be appreciated that there is more or less UE, and more than one BS can be there is.
For a subframe, suppose that it is configured to the uplink sub-frames for BS 840, namely, downlink transmission is there is between BS 840 and UE 810, but this subframe is configured to the uplink sub-frames of the neighbor cell for BS 840, that is, be uplink sub-frames for UE 820 and UE830.In this case, as shown in Figure 8, UE 820 and the ul transmissions of UE 830 in subframe may disturb the downlink transmission between BS 840 and UE 810.
Consider Fig. 8, Fig. 9 shows the method 800 for performing link adaptation in downlink subframe according to the disclosure second embodiment.
As shown in Figure 9, BS 840 can obtain and downlink subframe takies the interference (S910) of uplink sub-frames to downlink subframe of at least one neighbor cell UE at same time interval.
Exemplarily, described interference can be indicated by the intensity of PUSCH or PUCCH.
In addition, described interference can be measured based on the report from UE (as UE 810) by BS 840, or is measured by UE and be then reported to BS 840.
Then, BS 840 can determine whether obtained interference exceedes predetermined threshold (S920).
When obtained interference exceedes predetermined threshold, BS 840 can apply the first link adaptation ring (the "Yes" branch of S930, S920) to downlink subframe.
As non-restrictive example, the first link adaptation ring can by a SINR compensating factor (Δ as previously mentioned herein
adapted) characterize.In this case, can comprise the operation that downlink subframe applies the first link adaptation ring: based on a SINR compensating factor and in downlink subframe the SINR of actual measurement select Modulation and Coding Scheme (MCS).
Alternatively, a described SINR compensating factor feeds back based on the HARQ ACK/NACK that transmission when exceeding predetermined threshold with obtained interference is corresponding.
Alternatively, described method 900 can also comprise the following steps: when obtained interference is lower than predetermined threshold, applies the second link adaptation ring (the "No" branch of S940, S920) to described downlink subframe.
As non-restrictive example, the second link adaptation ring can by the 2nd SINR compensating factor (Δ as previously mentioned
adapted) characterize.In this case, can comprise the step that downlink subframe applies the second link adaptation ring: based on the 2nd SINR compensating factor and in downlink subframe the SINR of actual measurement select MCS.In addition, the 2nd SINR compensating factor can feed back lower than the HARQACK/NACK that transmission during predetermined threshold is corresponding based on obtained interference.
Such as, when being taken as Δ
adaptedtime, can feed back adaptive first/two SINR (or equivalently CQI) compensating factor according to formula 3 based on the HAQR ACK/NACK corresponding with the downlink transmission in corresponding downlink subframe.Parameter for the link adaptation of each downlink subframe needs not to be identical, comprises such as BLER target, HARQ sends the target numbers of attempting and initial delta value etc.
Adopt the method, downlink system performance can be improved, suffer the impairment of the downlink subframe disturbed by the ul transmissions of neighbor cell UE to protect the downlink subframe do not disturbed by the ul transmissions of neighbor cell UE to avoid; And realize the expected performance of the downlink subframe disturbed by the ul transmissions of neighbor cell UE.
With reference to Figure 10, the advantage of the link adaptation ring in the up link of the application relative to prior art is described.Figure 10 a shows the simulation result of the single link adaptation ring according to prior art, and Figure 10 b shows the simulation result of the dual link adaptation ring according to the application.As shown in the figure, when dual link adaptation ring, the performance of subframe 2 and 7 can be protected.
Figure 11 shows the block diagram of the base station 1100 for performing link adaptation in the uplink sub-frames for the first community according to the disclosure the 3rd embodiment.Base station 110 can comprise: acquiring unit 1110, determining unit 1120 and link adaptation unit 1130.
Acquiring unit 1110 can be configured to: acquisition and described uplink sub-frames take the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community.
Exemplarily, described interference can be indicated by the intensity of cell specific reference signal (CRS).Preferably, the intensity of described CRS can refer to the RSRP of CRS.
As another example, described interference can by the intensity of master sync signal (PSS) or the instruction such as the intensity of auxiliary synchronous signals (SSS) or the intensity of CSI-RS.
In addition, described interference can be determined according to the notice (notice on such as X2) between neighbor cell.
Determining unit 1120 can be configured to: determine whether obtained interference exceedes predetermined threshold.
Link adaptation unit 1130 can be configured to: when determining unit 1120 determines that obtained interference exceedes predetermined threshold, applies the first link adaptation ring to uplink sub-frames.
As non-restrictive example, the first link adaptation ring can by a SINR compensating factor (Δ as previously mentioned herein
adapted) characterize.In this case, link adaptation unit 1130 can comprise: the first selected cell (not shown), be configured to based on a SINR compensating factor and in uplink sub-frames the SINR of actual measurement select Modulation and Coding Scheme (MCS).
Alternatively, the CRC assay that a SINR compensating factor can be corresponding based on transmission when exceeding predetermined threshold with obtained interference.
Alternatively, link adaptation unit 1130 can also be configured to: when obtained interference is lower than predetermined threshold, applies the second link adaptation ring to described uplink sub-frames.
As non-restrictive example, the second link adaptation ring can by the 2nd SINR compensating factor (Δ as previously mentioned
adapted) characterize.In this case, link adaptation unit 1130 can comprise: the second selected cell (not shown), be configured to based on the 2nd SINR compensating factor and in uplink sub-frames the SINR of actual measurement select MCS.In addition, the 2nd SINR compensating factor can based on obtained interference lower than the corresponding CRC check result of transmission during predetermined threshold.
Figure 12 shows the block diagram of the base station 1200 for performing link adaptation in the downlink subframe for a UE according to the application the 4th embodiment.Base station 1200 can comprise acquiring unit 1210, determining unit 1220 and link adaptation unit 1230.
Acquiring unit 1210 can be configured to: acquisition and described downlink subframe take the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE.
Exemplarily, described interference can be indicated by the intensity of PUSCH or PUCCH.
In addition, described interference can be measured based on the report from UE by base station 1200, or is measured by UE and be then reported to base station 1200.
Determining unit 1220 can be configured to: determine whether obtained interference exceedes predetermined threshold.
Link adaptation unit 1230 can be configured to: when obtained interference exceedes predetermined threshold, applies the first link adaptation ring to downlink subframe.
As non-restrictive example, the first link adaptation ring can by a SINR compensating factor (Δ as previously mentioned herein
adapted) characterize.In this case, link adaptation unit 1230 can comprise: the first selected cell (not shown), be configured to based on a SINR compensating factor and in downlink subframe the SINR of actual measurement select Modulation and Coding Scheme (MCS).
Alternatively, the HARQ ACK/NACK that a SINR compensating factor can be corresponding based on transmission when exceeding predetermined threshold with obtained interference feeds back.
Alternatively, link adaptation unit 1230 can also be configured to: when obtained interference is lower than predetermined threshold, applies the second link adaptation ring to described downlink subframe.
As non-restrictive example, the second link adaptation ring can by the 2nd SINR compensating factor (Δ as previously mentioned
adapted) characterize.In this case, link adaptation unit 1230 can comprise: the second selected cell (not shown), is configured to the SINR based on the 2nd SINR compensating factor and actual measurement in described downlink subframe, selects MCS.In addition, the 2nd SINR compensating factor can feed back lower than the HARQ ACK/NACK that transmission during predetermined threshold is corresponding based on obtained interference.
Such as, when being taken as Δ
adaptedtime, can feed back adaptive first/two SINR (or equivalently CQI) compensating factor according to formula 3 based on the HARQ ACK/NACK corresponding with the downlink transmission in corresponding downlink subframe.Parameter for the link adaptation of each downlink subframe needs not to be identical, comprises such as BLER target, HARQ sends the target numbers of attempting and initial delta value etc.
It should be noted that two or more unit in the disclosure can carry out logic OR physical combination.Such as, base station 1100 and base station 1200 can be combined as individual unit.
It is emphasized that term " unit " when using in the disclosure with multiple multi-form realizations such as the software in accompanying drawing illustrated embodiment, firmware and hardware.
According to the previous embodiment of the application, the application can realize following advantage:
-can protect and guarantee the performance of the uplink sub-frames do not disturbed by the downlink transmission of neighbor cell, and the expected performance of the uplink sub-frames disturbed by the downlink transmission of neighbor cell can be realized;
-can protect and guarantee the performance of the downlink subframe do not disturbed by the ul transmissions of neighbor cell UE, and the expected performance of the downlink subframe disturbed by the ul transmissions of neighbor cell UE can be realized;
-low implementation complexity.
Other configurations of the present disclosure comprise the step of manner of execution embodiment and the software program of operation, and first described embodiment of the method is carried out generality and described and be then described in detail.More specifically, computer program is such embodiment, and it comprises the computer-readable medium that coding has computer program logic.Computer program logic provides corresponding operation, to provide above-mentioned link adaptation scheme when performing on the computing device.When computer program logic performs at least one processor, at least one processor of computing system is enable to perform the operation (method) of embodiment of the present disclosure.Configuration so of the present disclosure is typically provided as: provide or be coded in software, code and/or other data structures on computer-readable medium (as optical medium (such as CD-ROM), floppy disk or hard disk); Or other media (as the firmware on one or more ROM or RAM or PROM chip or microcode); Or application-specific integrated circuit (ASIC) (ASIC); Or the downloadable software mirror image in one or more module and shared data bank etc.Can mounting software, hardware or such configuration on the computing device, make one or more processor in computing equipment can perform technology described by embodiment of the present disclosure.Software process in conjunction with the computing equipment operation in such as one group of data communications equipment or other entities also can provide unit of the present disclosure.The multiple software process in multiple data communications equipment can also be distributed according to unit of the present disclosure, operate in all software process on one group of mini certain computer or run in all software process on a single computer.
More than describe and only give embodiment of the present disclosure, and be not intended to limit the disclosure by any way.Therefore, in disclosure spirit and principle any amendment, replacement, improvement etc. made should contain by the scope of the present disclosure.
Abbreviation
3GPP third generation Partnership Program
BLER Block Error Rate
CFI control format designator
CP Cyclic Prefix
CRC cyclic redundancy check (CRC)
CRS cell specific reference signal
CSI-RS channel state information reference signals
DL down link
DM-RS demodulated reference signal
HARQ hybrid automatic repeat-request
The long block of LB
RS reference signal
MCS Modulation and Coding Scheme
MIIT industry and information technology directorate
IRC interference rejection combiner
PDCCH physical downlink control channel
PDSCH physical down link sharing channel
PUSCH physical uplink link shared channels
PUCCH physical uplink control channel
PRB Physical Resource Block
RSRP Reference Signal Received Power
RX receives
SINR signal disturbing and noise ratio
TDD time division duplex
UE subscriber equipment
UL up link
Claims (amendment according to treaty the 19th article)
1., for performing a method for link adaptation in the uplink sub-frames for the first community, described method comprises:
Acquisition (710) and described uplink sub-frames take the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community;
Determine whether the interference that (720) obtain exceedes predetermined threshold;
When obtained interference exceedes predetermined threshold, to described uplink sub-frames application (730) first link adaptation rings; And
When obtained interference is lower than predetermined threshold, to described uplink sub-frames application (740) second link adaptation rings.
2. method according to claim 1, wherein, described first link adaptation ring correspond in described neighbor cell the interference obtained from neighbor cell.
3. method according to claim 1, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
4. method according to claim 3, wherein, described uplink sub-frames application (730) first link adaptation rings are comprised: based on the SINR of a SINR compensating factor and actual measurement in described uplink sub-frames, select Modulation and Coding Scheme (MCS).
5. method according to claim 3, wherein, a described SINR compensating factor is based on the corresponding CRC check result of transmission when exceeding predetermined threshold with obtained interference.
6. method according to claim 1, wherein, described interference is indicated by the intensity of cell specific reference signal CRS.
7. method according to claim 6, wherein, the intensity of described CRS is the RSRP of CRS.
8. method according to claim 1, wherein, described interference is indicated by the intensity of the intensity of master sync signal (PSS) or the intensity of auxiliary synchronous signals (SSS) or CSI-RS.
9., for performing a method for link adaptation in the downlink subframe for first user equipment UE, described method comprises:
Acquisition (910) and described downlink subframe take the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE;
Determine whether the interference that (920) obtain exceedes predetermined threshold;
If the interference obtained exceedes predetermined threshold, to described downlink subframe application (930) first link adaptation rings; And
If the interference obtained is lower than predetermined threshold, to described downlink subframe application (940) second link adaptation rings.
10. method according to claim 9, wherein, described first link adaptation ring correspond in described neighbor cell UE the interference obtained from neighbor cell UE.
11. methods according to claim 9, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
12. methods according to claim 11, wherein, described downlink subframe application (930) first link adaptation rings are comprised: based on the SINR of a SINR compensating factor and actual measurement in described downlink subframe, select Modulation and Coding Scheme (MCS).
13. methods according to claim 11, wherein, a described SINR compensating factor feeds back based on the HARQ ACK/NACK that transmission when exceeding predetermined threshold with obtained interference is corresponding.
14. methods according to claim 9, wherein, described interference is indicated by the intensity of PUSCH or PUCCH.
15. 1 kinds of link adaptation methods, comprising:
First link adaptation ring is applied to the first sub-frame set; And
Second link adaptation ring is applied to the second sub-frame set.
16. 1 kinds for performing the base station (1100) of link adaptation in the uplink sub-frames for the first community, described base station comprises:
Acquiring unit (1110), is configured to acquisition and described uplink sub-frames takies the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community;
Determining unit (1120), is configured to determine whether obtained interference exceedes predetermined threshold;
Link adaptation unit (1130), is configured to work as obtained interference when exceeding predetermined threshold, applies the first link adaptation ring to described uplink sub-frames; And when working as obtained interference lower than predetermined threshold, the second link adaptation ring is applied to described uplink sub-frames.
17. base stations according to claim 16, wherein, described first link adaptation ring correspond in described neighbor cell the interference obtained from neighbor cell.
18. base stations according to claim 16, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
19. base stations according to claim 18, wherein, described link adaptation unit (1130) comprising: the first selected cell, be configured to the SINR based on a SINR compensating factor and actual measurement in described uplink sub-frames, select Modulation and Coding Scheme (MCS).
20. base stations according to claim 18, wherein, a described SINR compensating factor is based on the corresponding CRC check result of transmission when exceeding predetermined threshold with obtained interference.
21. base stations according to claim 16, wherein, described second link adaptation ring is characterized by the 2nd SINR compensating factor.
22. base stations according to claim 21, wherein, described link adaptation unit (1130) comprising: the second selected cell, is configured to the SINR based on the 2nd SINR compensating factor and actual measurement in described uplink sub-frames, selects MCS.
23. base stations according to claim 21, wherein, described 2nd SINR compensating factor based on obtained interference lower than the corresponding CRC check result of transmission during predetermined threshold.
24. base stations according to claim 16, wherein, described interference is indicated by the intensity of cell specific reference signal CRS.
25. base stations according to claim 16, wherein, the intensity of described CRS is the RSRP of CRS.
26. base stations according to claim 16, wherein, described interference is indicated by the intensity of the intensity of master sync signal (PSS) or the intensity of auxiliary synchronous signals (SSS) or CSI-RS.
27. 1 kinds for performing the base station (1200) of link adaptation in the downlink subframe for first user equipment UE, described base station comprises:
Acquiring unit (1210), is configured to acquisition and described downlink subframe takies the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE;
Determining unit (1220), is configured to determine whether obtained interference exceedes predetermined threshold; And
Link adaptation unit (1230), is configured to, when obtained interference exceedes predetermined threshold, apply the first link adaptation ring to described downlink subframe; And when obtained interference is lower than predetermined threshold, the second link adaptation ring is applied to described downlink subframe.
28. base stations according to claim 27, wherein, described first link adaptation ring correspond in described neighbor cell UE the interference obtained from neighbor cell UE.
29. base stations according to claim 27, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
30. base stations according to claim 29, wherein, described link adaptation unit (1230) comprising: the first selected cell, be configured to the SINR based on a SINR compensating factor and actual measurement in described downlink subframe, select Modulation and Coding Scheme (MCS).
31. base stations according to claim 29, wherein, a described SINR compensating factor feeds back based on the HARQ ACK/NACK that transmission when exceeding predetermined threshold with obtained interference is corresponding.
32. base stations according to claim 27, wherein, described second link adaptation ring is characterized by the 2nd SINR compensating factor.
33. base stations according to claim 32, wherein, described link adaptation unit (1230) comprising: the second selected cell, is configured to the SINR based on the 2nd SINR compensating factor and actual measurement in described downlink subframe, selects MCS.
34. base stations according to claim 32, wherein, described 2nd SINR compensating factor feeds back lower than the HARQ ACK/NACK that transmission during predetermined threshold is corresponding based on obtained interference.
35. base stations according to claim 27, wherein, described interference is indicated by the intensity of PUSCH or PUCCH.
36. 1 kinds of link adaptation devices, comprising: link adaptation unit, are configured to apply the first link adaptation ring to the first sub-frame set, and apply the second link adaptation ring to the second sub-frame set.
Claims (40)
1., for performing a method for link adaptation in the uplink sub-frames for the first community, described method comprises:
Acquisition (710) and described uplink sub-frames take the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community;
Determine whether the interference that (720) obtain exceedes predetermined threshold; And
When obtained interference exceedes predetermined threshold, to described uplink sub-frames application (730) first link adaptation rings.
2. method according to claim 1, also comprises: when obtained interference is lower than predetermined threshold, to described uplink sub-frames application (740) second link adaptation rings.
3. method according to claim 1, wherein, described first link adaptation ring correspond in described neighbor cell the interference obtained from neighbor cell.
4. method according to claim 1, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
5. method according to claim 4, wherein, described uplink sub-frames application (730) first link adaptation rings are comprised: based on the SINR of a SINR compensating factor and actual measurement in described uplink sub-frames, select Modulation and Coding Scheme (MCS).
6. method according to claim 4, wherein, a described SINR compensating factor is based on the corresponding CRC check result of transmission when exceeding predetermined threshold with obtained interference.
7. method according to claim 1, wherein, described interference is indicated by the intensity of cell specific reference signal CRS.
8. method according to claim 7, wherein, the intensity of described CRS is the RSRP of CRS.
9. method according to claim 1, wherein, described interference is indicated by the intensity of the intensity of master sync signal (PSS) or the intensity of auxiliary synchronous signals (SSS) or CSI-RS.
10., for performing a method for link adaptation in the downlink subframe for first user equipment UE, described method comprises:
Acquisition (910) and described downlink subframe take the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE;
Determine whether the interference that (920) obtain exceedes predetermined threshold; And
If the interference obtained exceedes predetermined threshold, to described downlink subframe application (930) first link adaptation rings.
11. methods according to claim 10, also comprise: if the interference obtained is lower than predetermined threshold, to described downlink subframe application (940) second link adaptation rings.
12. methods according to claim 10, wherein, described first link adaptation ring correspond in described neighbor cell UE the interference obtained from neighbor cell UE.
13. methods according to claim 10, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
14. methods according to claim 13, wherein, described downlink subframe application (930) first link adaptation rings are comprised: based on the SINR of a SINR compensating factor and actual measurement in described downlink subframe, select Modulation and Coding Scheme (MCS).
15. methods according to claim 13, wherein, a described SINR compensating factor feeds back based on the HARQ ACK/NACK that transmission when exceeding predetermined threshold with obtained interference is corresponding.
16. methods according to claim 10, wherein, described interference is indicated by the intensity of PUSCH or PUCCH.
17. 1 kinds of link adaptation methods, comprising:
First link adaptation ring is applied to the first sub-frame set; And
Second link adaptation ring is applied to the second sub-frame set.
18. 1 kinds for performing the base station (1100) of link adaptation in the uplink sub-frames for the first community, described base station comprises:
Acquiring unit (1110), is configured to acquisition and described uplink sub-frames takies the downlink subframe of at least one neighbor cell at same time interval to the interference of the uplink sub-frames of described first community;
Determining unit (1120), is configured to determine whether obtained interference exceedes predetermined threshold; And
Link adaptation unit (1130), is configured to work as obtained interference when exceeding predetermined threshold, applies the first link adaptation ring to described uplink sub-frames.
19. base stations according to claim 18, wherein, described link adaptation unit (1130) is also configured to: when obtained interference is lower than predetermined threshold, applies the second link adaptation ring to described uplink sub-frames.
20. base stations according to claim 18, wherein, described first link adaptation ring correspond in described neighbor cell the interference obtained from neighbor cell.
21. base stations according to claim 18, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
22. base stations according to claim 21, wherein, described link adaptation unit (1130) comprising: the first selected cell, be configured to the SINR based on a SINR compensating factor and actual measurement in described uplink sub-frames, select Modulation and Coding Scheme (MCS).
23. base stations according to claim 21, wherein, a described SINR compensating factor is based on the corresponding CRC check result of transmission when exceeding predetermined threshold with obtained interference.
24. base stations according to claim 19, wherein, described second link adaptation ring is characterized by the 2nd SINR compensating factor.
25. base stations according to claim 24, wherein, described link adaptation unit (1130) comprising: the second selected cell, is configured to the SINR based on the 2nd SINR compensating factor and actual measurement in described uplink sub-frames, selects MCS.
26. base stations according to claim 24, wherein, described 2nd SINR compensating factor based on obtained interference lower than the corresponding CRC check result of transmission during predetermined threshold.
27. base stations according to claim 18, wherein, described interference is indicated by the intensity of cell specific reference signal CRS.
28. base stations according to claim 18, wherein, the intensity of described CRS is the RSRP of CRS.
29. base stations according to claim 19, wherein, described interference is indicated by the intensity of the intensity of master sync signal (PSS) or the intensity of auxiliary synchronous signals (SSS) or CSI-RS.
30. 1 kinds for performing the base station (1200) of link adaptation in the downlink subframe for first user equipment UE, described base station comprises:
Acquiring unit (1210), is configured to acquisition and described downlink subframe takies the uplink sub-frames of at least one neighbor cell UE at same time interval to the interference of the downlink subframe of a described UE;
Determining unit (1220), is configured to determine whether obtained interference exceedes predetermined threshold; And
Link adaptation unit (1230), is configured to, when obtained interference exceedes predetermined threshold, apply the first link adaptation ring to described downlink subframe.
31. base stations according to claim 30, wherein, described link adaptation unit (1230) is also configured to: when obtained interference is lower than predetermined threshold, applies the second link adaptation ring to described downlink subframe.
32. base stations according to claim 30, wherein, described first link adaptation ring correspond in described neighbor cell UE the interference obtained from neighbor cell UE.
33. base stations according to claim 30, wherein, described first link adaptation ring is characterized by a SINR compensating factor.
34. base stations according to claim 33, wherein, described link adaptation unit (1230) comprising: the first selected cell, be configured to the SINR based on a SINR compensating factor and actual measurement in described downlink subframe, select Modulation and Coding Scheme (MCS).
35. base stations according to claim 33, wherein, a described SINR compensating factor feeds back based on the HARQ ACK/NACK that transmission when exceeding predetermined threshold with obtained interference is corresponding.
36. base stations according to claim 31, wherein, described second link adaptation ring is characterized by the 2nd SINR compensating factor.
37. base stations according to claim 36, wherein, described link adaptation unit (1230) comprising: the second selected cell, is configured to the SINR based on the 2nd SINR compensating factor and actual measurement in described downlink subframe, selects MCS.
38. base stations according to claim 36, wherein, described 2nd SINR compensating factor feeds back lower than the HARQ ACK/NACK that transmission during predetermined threshold is corresponding based on obtained interference.
39. base stations according to claim 30, wherein, described interference is indicated by the intensity of PUSCH or PUCCH.
40. 1 kinds of link adaptation devices, comprising: link adaptation unit, are configured to apply the first link adaptation ring to the first sub-frame set, and apply the second link adaptation ring to the second sub-frame set.
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| CN108990154A (en) * | 2017-06-02 | 2018-12-11 | 维沃移动通信有限公司 | A kind of transmission method, relevant device and system for terminal self-interference |
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| EP2974488B1 (en) | 2013-03-14 | 2020-05-06 | Telefonaktiebolaget LM Ericsson (publ) | Methods radio network nodes and user equipment for alleviating interference in a radio communication network |
| US9319916B2 (en) | 2013-03-15 | 2016-04-19 | Isco International, Llc | Method and appartus for signal interference processing |
| US9775116B2 (en) | 2014-05-05 | 2017-09-26 | Isco International, Llc | Method and apparatus for increasing performance of communication links of cooperative communication nodes |
| EP3228135B1 (en) | 2014-12-05 | 2020-03-18 | Telefonaktiebolaget LM Ericsson (publ) | Method and communication device for performing link adaptation |
| FI3651386T3 (en) | 2015-05-04 | 2023-11-15 | Isco Int Llc | Method and apparatus for increasing the performance of communication paths for communication nodes |
| US10425185B2 (en) | 2015-08-25 | 2019-09-24 | Telefonaktiebolaget Lm Ericsson (Publ) | WLAN nodes, and methods therein for efficient usage of WLAN resources |
| US10652835B2 (en) | 2016-06-01 | 2020-05-12 | Isco International, Llc | Signal conditioning to mitigate interference impacting wireless communication links in radio access networks |
| EP3465958B1 (en) * | 2016-06-07 | 2021-02-17 | Telefonaktiebolaget LM Ericsson (publ) | Outer-loop adjustment for link adaptation |
| US10383101B1 (en) | 2017-03-06 | 2019-08-13 | Sprint Spectrum L.P. | Dynamic link adaptation |
| US10298279B2 (en) | 2017-04-05 | 2019-05-21 | Isco International, Llc | Method and apparatus for increasing performance of communication paths for communication nodes |
| US10284313B2 (en) | 2017-08-09 | 2019-05-07 | Isco International, Llc | Method and apparatus for monitoring, detecting, testing, diagnosing and/or mitigating interference in a communication system |
| US10812121B2 (en) | 2017-08-09 | 2020-10-20 | Isco International, Llc | Method and apparatus for detecting and analyzing passive intermodulation interference in a communication system |
| CN111373676B (en) * | 2017-11-30 | 2021-08-13 | 上海诺基亚贝尔股份有限公司 | Method and apparatus for improving resource efficiency in a wireless communication system |
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| US8054787B2 (en) * | 2006-10-20 | 2011-11-08 | Stmicroelectronics, Inc. | Apparatus and method for enhanced adaptive channel selection and subframe allocation in a communication system |
| JP5452375B2 (en) | 2010-06-03 | 2014-03-26 | 株式会社日立製作所 | base station |
| CN102281119A (en) * | 2010-06-12 | 2011-12-14 | 中兴通讯股份有限公司 | Adaptive coding modulation method for uplink and base station for realizing same |
| US8687527B2 (en) * | 2010-09-16 | 2014-04-01 | Nec Laboratories America, Inc. | Low complexity link adaptatation for LTE/LTE-A uplink with a turbo receiver |
| CN102215534B (en) * | 2011-05-31 | 2016-03-23 | 电信科学技术研究院 | Sub-frame configuration coordination approach and device thereof between a kind of TDD cell |
| US8879667B2 (en) * | 2011-07-01 | 2014-11-04 | Intel Corporation | Layer shifting in open loop multiple-input, multiple-output communications |
| CN102281638B (en) * | 2011-08-02 | 2014-07-09 | 电信科学技术研究院 | Method and equipment for scheduling slot |
| CN102333377A (en) | 2011-11-08 | 2012-01-25 | 东南大学 | Resource allocation method capable of avoiding cross-slot interference in long-term evolution time division system |
| US8971277B2 (en) * | 2012-01-13 | 2015-03-03 | Hitachi Kokusai Electric Inc. | Wireless communication system and receiving device |
| US9119120B2 (en) * | 2012-01-23 | 2015-08-25 | Intel Corporation | Network assisted user association and offloading techniques for integrated multi-rat heterogeneous networks |
| WO2014047773A1 (en) * | 2012-09-25 | 2014-04-03 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for radio link adaptation for flexible subframe communications |
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| CN108990154A (en) * | 2017-06-02 | 2018-12-11 | 维沃移动通信有限公司 | A kind of transmission method, relevant device and system for terminal self-interference |
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| US10277358B2 (en) | 2019-04-30 |
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Application publication date: 20150527 |